Setting and cementing tool



Jan. 31,1939. H HUDSON r AL 2,145,512

SETTING AND CEMENTING TOOL 2 Sheets-Sheet 1 iazlifiadso z,"

Filed June 22, 1958 e70- 15km GHzzdsm L Jan. 31, 1939. J HUDSON AL 2,145,512

SETTING AND CEMENTING TOOL 2 SheetS -Sheet 2 Filed June 22, 1938 I ,11. I.| MW

ATTORNEYS WITNESS 30 the liner. atl3.

Patented Jan. 31, 1939 l I! UNITED STATES PATENT OFFICE 2,145,512 sarrmo AND CEMENTING 'roor'.

John H. Hudson and Henry G. Hudson, Ardmore, Okla.

Application June 22, 1938, Serial No. 215,275

3 Claims. (Cl. 16 6--1) Our invention relates to improvements in well lustrating the bolts in retracted position and the equipment and particularly todevices for-anchcrliner anchored to the casing. ing or securing liners or the like in the casing of Figure 3 is a sectional view taken on the line a well from vertical movement either upwardly 3-3 of Figure 1.

or downwardly regardless of the pressure exist- Figure 4 is a fragmentary side elevation of the 5 :ing in the well. liner illustrating the slips and spring in retracted While the invention has been devised for the position. purpose of anchoring a liner within a well to en- In practicing our invention we provide an elonable the latter to be cemented to the casing, it gated cylindrical shaped tool I having upper,

0 will be understood by those skilled in the art that intermediate and lower sections 2, 3 and 4 rethe mechanism may be employed in any environspectively. The .sections are fashioned with a ment where it is desirable to make a tight conlongitudinally extending bore 5 having open ends.

- nection between the interior of a. well casing and Each of said sections is connected togethe y the exterior of an internal member suchas well right-hand screw threads. The upper end of the tubing. Obviously, it will be especially useful i upper section is interna y sc ew threaded for the 15 pumping or flowing wells. reception of a lowering pipe 6. A liner or sleeve, One of the principal objects of the present inl is secured to the upper ect on twee t e vention is to provide an anchoring mechanism ends thereof by means of left-hand screw threads or tool which may be controlled from above the 8. Said liner extends downwardly about the lower surface of a well in a manner to reliably secure p rti n of t u p r section 2, nt diat 20 the liner to the casing against vertical movement tlon 3 and lower section 4 as clearly illustrated in either upwardly or downwardly regardless of the t e d awi sdl e we end of t e pressuree'xistihg in the well or otherwise applied upper Section 2 the sleeve is fashioned 0n the to said liner. outer peripheral face with a pair of oppositely Another object 01' the invention is to provide a disposed recesses having upper a lower 26 tool attachable to the liner of a well and loweri ied e d c i 9. vPositioned w i the able therewith into the casing of thewell and cess s Ha pa s s ns l I each f s i n d wi operable for efiecting engagement of the liner ppi l for engagement With the with the casing and for detaching the tool from terior wall of the casing of the Well as indicated A further object of the invention is to provide A- plr Spring mounted about h lin r 1 a tool equipped with means for preventing the between the jaws of the slips and normally tends entrance .of cement or the like to within the liner to urge the jaws o e y from each during the cementing operation of the-liner to other and into en a p t o W th e i the tube. 1 a terior of the casing l3. 35

A special object of our invention is to provide ou Within the u per d the intera toolof the above described character which is media e s ct on' 3 a ubl ent e l wer e d simple in construction, durable i use, emcient of h u r e n 2 1s a p r of oppositely exin operation and economical in manufacture. e i bo it having outer e sections ex-\ 40 Other objects and advantages will be appare t tending through the wall of the section 3 into 40 from th following description appended claims suitable apertures formed in the wall of the liner and annexed drawings. intermediate of the ends of therecesses. Said Referring to the drawings wherein like refer 2,2 5232 32: ii gg gi g ig t g fi gg $5 4 2;

ggg s gig xg i g parts thrugnout in the overlying end of the slips whereby to: se- Figure 1 is a longitudinal sectional view of the g said slips in retractedposition against ension of the spring thereby maintaining the upper section Of the Same j t of g g t t interior connected to the upper section of the liner and Wa di d with th 1 of the tube la. The wall of the intermediate 9 n e of a welh member 3 is provided with packing devices about 50 3 8 1a is similar w to Figure the bolts l4 whereby to prevent leakage of liquid at the intermediate Section Of the and the like from the bore 5 to between the outer Fi ure 1 is w mil r o Figure 1 lllusface of the section 3 and interior face of the liner. trating the lower section of the tool. Normally seated against the lower end of the Figure 2 is a view similar to Figure 1', but 11- upper section 2 is a release head l8 provided with 66 out of the openings in section 2 and serve to maintain the bolts II in extended position.

When it is desired to clamp or anchor the liner '1 to the casing IS a weight is lowered through the lowering pipe 6 and impacted against the head l8 thereby causing the ends of the prongs I! to shear the pins l8, permitting the head and prongs to move downwardly and effect retraction of the bolts H as clearly illustrated in Figure 2 of the drawings. When the bolts II are moved to retracted position the overlying ends of the slips are released and the respective slips of each pair moved away from each other by the action of the spring, thereby causing the jaws to engage the casing and thus anchor the liner to said casing.

When the bolts H are thus actuated to retracted position, the outer ends thereof are moved the liner thus releasing the tool from bolted engagement with the liner. The lower end section of the lower section 4 is fashioned with a reduced shank l9 forming an inclined shoulder 20 in which is mounted a gasket 2| for engagement with a similar shapedface of a nut 22 threadedly secured on the upper end of a piston 23 equipped on the outer face thereof with a band of yieldable material 24 engaging the inner wall of the liner as illustrated in Figure lb.

The piston 23 is slidably mounted on the shank I9 and the lower end of said shank is equipped with a nut 25 for limiting the downward movement of the piston relative to the shank.

In operation the tool sections 2, 3 and I are threaded together and secured onto the lower end of the lowering pipe 6. When thus assembled, the liner 1 is threaded onto/the upper section 2 of the tool by means of the left-hand threads 8 and the slips are adjusted towards each other and the bolts moved outwardly to extended position. The pair of the shearing pins l8 are inserted in the wall of the section 3 forming a rest for the lower ends of the prongs I! as clearly illustrated in Figure l of the drawings. The parts thus assembled are then lowered a desired distance into the casing of a well and the weight operated to effect shearing of the'pins l8 whereby the jaws of the slips engage the casing as heretofore set forth. When the liner is thus anchored to the casing, the tool and lowering pipe are rotated in a direction to effect unthreading of the tool from the liner and the tool raised a sufllcient distance within'the liner to position the piston at the top of the liner thereby preventing cement and the like introduced into the casing about the exterior of the'lining from entering the interior of said liner. When the cement is thus introduced about the liner, the tool is removed from the casing and the cement allowed to set about the liner, thus securing the latter to the casing.

What we claim is:

l. A device of the character described, comprising, a tool adapted to be secured to' the end of a lowering pipe for lowering into a well casing, said tool fashioned with upper, intermediate and lower sections, a liner threaded to said upper section and extending downwardly about said intermediate and lower section, pairs of slips carried by'said liner for engagement with said well casing, a spring carried by said liner and engaging said slips for urging the latter into casing engaging position, bolts slidably mounted in said intermediate section and normally extending through said liner for maintaining said slips in non-casing engaging position against the tension of said spring, and a bolt actuating device within said intermediate section and adapted to beoperated by a weight .for moving said bolt to retracted position to permit said slips to be actuated into casing engaging position by the action of said spring whereby to secure said liner to said casing.

2. A device of the prising, a tool adaptedto be secured to the end of a lowering pipe for lowering into a well casing, said tool fashioned with upper, intermediate and lower sections, a liner threaded to said upper section and extending downwardly about said intermediate and lower section, pairs of slips carried by said liner for engagement with said well character described, com

casing,a spring carried by said liner and engaging said slips for urging the latter into casing engaging position, bolts slidably mounted in said intermediate section and normally extending through said liner for maintaining said slips in non-casing engaging position against the tension of said spring, a bolt actuating device within said intermediate section and adapted to beoperated by a weight for moving said bolt to retracted position to permit said slips to be actuated into casing engaging position by the action of said spring whereby to secure said liner to'said casing, and a piston carried .by said lower section and engaging the inner periphery of said liner for precluding admittance of foreign matter within said liner from above upon unthreading and partial withdrawal of said tool from said liner.

3. A device of the character described, comprising, a tool adapted to be secured to the end of a lowering pipe and lowered into a well casing, said tool fashioned with upper, intermediate and lowersections, a liner threaded to said upper section and extending downwardly about said intermediate and lower section, pairs of slips-carried by said liner for engagement-with said well casing, a spring carried by said liner and engaging said slips for normally urging the latter into casing engaging position, bolts mounted in said intermediate section and normally extending through said liner for maintaining said slips in non-casing position, shear pins mounted within said intermediate section subjacent said bolts, a bolt release head within said intermediate section and seated against said upper section, said head provided with inclined prongs extending through said bolts and engaging said pins whereby to maintain said bolts in extendedposition, said head adapted to be actuated downwardly by a weight to effect shearing of said pins by said prongs to effect retraction of said bolts to release said slips whereby the latter are moved to casin engaging position by the action of said spring. JOHN H. HUDSON. HENRY G. HUDSON. 

